kc3-lang/angle

2025-09-16T16:46:36

mac: handle Metal toolchain being unbundled from Xcode 26 The Metal toolchain was formerly part of Xcode, but in Xcode 26, it has been unbundled and is now a separate install. Attempting to use the Metal toolchain without installing it results in a build error, such as: error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain By running the suggested command, the Metal toolchain can be installed, but the existing angle build does not know how to find it correctly. For system Xcode installations, tools from the Metal toolchain (`metal` and `metallib`) can be run via `xcrun`. This construct should work equally well for older Xcode versions, for situations where it’s still in use. For the hermetic toolchain, we’ll continue splicing the Metal toolchain into the location it had previously been avialable (see https://chromium-review.googlesource.com/c/6950738), although this is subject to change in the future. Bug: chromium:423933062, chromium:445400016 Change-Id: I139eca51938f7cecfec9b90fd488947160ef4ec9 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6955000 Auto-Submit: Mark Mentovai <mark@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>